In heraldry and vexillology, fimbriation is the placement of small stripes of colour (technically called `tincture` in this sense in heraldry) around common charges or ordinaries, usually in order for them to stand out from the background, but perhaps just because the designer felt it looked better, or for a more technical reason (in heraldry on.....
is a narrow line separating two other colors in a flag.
fimbriate or fringed condition. · a fringe or fringelike part.